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-   -   How To CalMAN - What the Charts and Reports Mean (http://www.ControlCAL.com/forum/showthread.php?t=556)

eddiscus 01-25-2010 08:22 AM

CalMAN - What the Charts and Reports Mean
 
In report that I have posted items 1,2,3,4,5,6 and 8 are all related to greyscale/greyscale luminance. Items 7 and 9 are the display's color points (primary and secondary).

http://i46.tinypic.com/91gx1f.jpg

Item 1: Luminance Y chart is a graphic representation of the Y values in item 8. Based off of you 100 luminance reading all your other readings need to fall on specific points along the orange curve based on the gamma you are trying to calibrate to or the displays limitation.

Item 2: Greyscale temperature, Your red line is the target line and the blue line is the measured values. If the displays RGB balance and tracking are ideal then the measured values should match the line perfectly. If the measured greyscale point has more red than blue then the measured value will fall below the desired target line and the greyscale pattern will start to appear warm in color. The opposit will occur if there is more blue than red in the measured greyscale pattern.

Item 3 and 4: Ideally you want the RGB lines to be as close to 100 (mid graph) as possible. The further they deviate from each other the higher your DeltaE becomes in item 6.

Item 5: A plotted graphic representation of the x,y values from item 8. If your RGB values for each greyscale point are all on spec then each reading should fall behind the orange dot on the graph.

Item 6: DeltaE chart, the further off the balance is in items 3 and 4 the higher the DeltaE will be. Typically when the DeltaE gets above 3 then it starts to become visible to the eye.

Item 8: The measured greyscale data points.

Items 7 and 9: Your displays primary and secondary color points. As well as the displays 75% and 100% white points. The square boxes are the rec709 points and the black dots are the measured values.



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eddiscus 01-25-2010 08:33 AM

Color Chart explanation.

http://i48.tinypic.com/2rhmsf6.jpg

1: Color Gamut chart shows the measured points (black dots) and the rec709 color points (squares).

2: Combined color error. Levels below 3 are considered acceptable.

3: Delta L- errors in the color points luminance level this error is not indicated by the Color gamut chart. But the one most easily perceived by the human eye.

4: Delta C- Error in color saturation this is also shown on the Gamut chart by movement of the color point towards or away from the D65 white point near the middle of the triangle.

5: Delta H- Color Hue error. This is indicated by a shift in a color towards one of the adjacent colors. For example if we take the green color point and shift it only towards blue or red then we would have a hue error developing with green.

6: The measured values and Delta numbers.

7: The Delta values of the point currently being measured.


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eddiscus 01-25-2010 08:34 AM

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eddiscus 01-25-2010 09:18 AM

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eddiscus 01-25-2010 09:19 AM

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